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[KevinCathcart]

@DavidMStraub

Thanks a lot to everybody who worked on this, this is brilliant.

I have it working with my Android phone and with a NodeMCU using esptool and this configuration.

Two questions:

1. Even if I “write” the tag with the companion app, the ID returned by the NodeMCU is different from the one returned by the phone. Is this intentional? Is there a way to have a single card return the same ID on every device?
2. Is it always necessary to unlock the screen on Android? For me there is no effect if the screen is locked.

1. Adonno’s ESPHome configuration currently does not yet support reading the content of the card, only the read-only id number from the header. This is a limitation of the card reader component in ESPHome. Android/IOS use an tag number encoded in the data.

   In the mean time, one possible work around is to first scan the card with the ESPHome device. Then use the Android or IOS to write that same card ID back to the body of the card. In theory that should make both recognize it as the same card.

2. NFC is deliberately restricted by android when locked or screen off, such that apps cannot receive NCF intents while locked. It might be possible to bypass this while rooting the phone, but not in unmodified Android.